EP 1412411 A2 20040428 - PROCESS FOR PREPARING POLYCARBONATE AND APPARATUS FOR PREPARING POLYCARBONATE
Title (en)
PROCESS FOR PREPARING POLYCARBONATE AND APPARATUS FOR PREPARING POLYCARBONATE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON POLYCARBONATEN UND APPARATUR ZUR HERSTELLUNG DERSELBEN
Title (fr)
PROCEDE DE PREPARATION DE POLYCARBONATE ET DISPOSITIF DE PREPARATION DE POLYCARBONATE
Publication
Application
Priority
- JP 2001217251 A 20010717
- US 0216826 W 20020523
- US 6328202 A 20020408
Abstract (en)
[origin: WO03008481A2] A process for preparing an end-capped polycarbonate comprises melt reacting an aromatic dihydroxy compound, a carbonic acid diester, and optionally a catalyst in a prepolymerization vessel 4a/4b to form a polycarbonate product; transferring the polycarbonate product from the prepolymerization vessel 4a/ab; mixing the polycarbonate product with an end-capping agent under hermetic seal at a pressure of at least about 76 mm Hg; and transferring the polycarbonate product and en-capping agent mixture to a postpolymerization vessel 9 to endcap the polycarbonate product. An apparatus for preparing an end-capped polycarbonate comprises a prepolymerization vessel 4a/4b having and inlet and an outlet; a postpolymerization vessel 9 having an inlet and an outlet; a mixer in fluid communication with the outlet of the prepolymerization vessel 4a/4b and the inlet of the postpolymerization vessel 9; and a charging port through which an end-capping agent is charged to the mixer, wherein the mixer is hermetically sealed at greater than or equal to 760 mm Hg.
IPC 1-7
IPC 8 full level
C08G 64/42 (2006.01); C08G 64/00 (2006.01); C08G 64/14 (2006.01); C08G 64/20 (2006.01); C08G 64/30 (2006.01)
CPC (source: EP KR US)
C08G 64/14 (2013.01 - EP US); C08G 64/20 (2013.01 - KR); C08G 64/205 (2013.01 - EP US); C08G 64/307 (2013.01 - EP US); C08G 64/42 (2013.01 - EP US)
Citation (search report)
See references of WO 03008481A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 03008481 A2 20030130; WO 03008481 A3 20030410; WO 03008481 A8 20040226; AT E335780 T1 20060915; AU 2002312121 A1 20030303; CN 1304458 C 20070314; CN 1555392 A 20041215; DE 60213821 D1 20060921; DE 60213821 T2 20070329; EP 1412411 A2 20040428; EP 1412411 B1 20060809; JP 2003026794 A 20030129; JP 4606660 B2 20110105; KR 20040030809 A 20040409; TW 593420 B 20040621; US 2003088051 A1 20030508; US 6620902 B2 20030916
DOCDB simple family (application)
US 0216826 W 20020523; AT 02739476 T 20020523; AU 2002312121 A 20020523; CN 02818022 A 20020523; DE 60213821 T 20020523; EP 02739476 A 20020523; JP 2001217251 A 20010717; KR 20047000729 A 20020523; TW 91114845 A 20020704; US 6328202 A 20020408